Earth's first steps : tracking life before the dinosaurs /

Bibliographic Details
Main Author:	MacDonald, Jerry
Format:	Book
Language:	English
Published:	[Boulder, Colo.] : [Johnson Books], [1994]
Subjects:	Footprints, Fossil > New Mexico > Robledo Mountains. Paleontology > Permian. Animals, Fossil > New Mexico > Robledo Mountains.

by MacDonald, Jerry
Published 1994

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